Question about Dometic Rooftop RV Air Conditioner

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The blower on my Dometic Rooftop AC shuts off then the RV reaches the set tempature but the compressor keeps running. It even runs when the therostat is in the off position. It will only shut off when the breaker is turned off. Can you help? If so, can the problem be fixed by myself?

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  • richard_k521 Aug 24, 2010

    Thanks, I'll give it a try.

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There is a wire that is wired to the wrong unit,the thermostat wire needs to go to the compressor,so it will cycle,and the wire that is going to the compressor needs to go to the blower.

Posted on Aug 25, 2010

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The compressor is powered by the control board thru a relay. If it doesn't shut down it's because the relay is still activated.
You need to find out why: either the relay is stuck shut (replace it) or the command is constantly on (something is wrong with the thermostat or the connections from the board).
To find out which you need to open the unit, identify the circuits and test the parts - all you need is a basic multimeter and at least basic knowledge of electric systems. If you have it then yes, you can do it.

Posted on Aug 24, 2010

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